[Mesa-dev] [PATCH 4/8] gallium/radeon: R600_DEBUG=nodccfb disables separate DCC

[Marek Olšák]

From: Marek Olšák <marek.olsak at amd.com>

---
 src/gallium/drivers/radeon/r600_pipe_common.c | 1 +
 src/gallium/drivers/radeon/r600_pipe_common.h | 1 +
 src/gallium/drivers/radeon/r600_texture.c     | 3 ++-
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/radeon/r600_pipe_common.c b/src/gallium/drivers/radeon/r600_pipe_common.c
index 6b701b6..5e981d6 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.c
+++ b/src/gallium/drivers/radeon/r600_pipe_common.c
@@ -572,6 +572,7 @@ static const struct debug_named_value common_debug_options[] = {
 	{ "mono", DBG_MONOLITHIC_SHADERS, "Use old-style monolithic shaders compiled on demand" },
 	{ "noce", DBG_NO_CE, "Disable the constant engine"},
 	{ "unsafemath", DBG_UNSAFE_MATH, "Enable unsafe math shader optimizations" },
+	{ "nodccfb", DBG_NO_DCC_FB, "Disable separate DCC on the main framebuffer" },
 
 	DEBUG_NAMED_VALUE_END /* must be last */
 };
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.h b/src/gallium/drivers/radeon/r600_pipe_common.h
index 203d863..fc50b91 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.h
+++ b/src/gallium/drivers/radeon/r600_pipe_common.h
@@ -100,6 +100,7 @@
 #define DBG_MONOLITHIC_SHADERS	(1llu << 47)
 #define DBG_NO_CE		(1llu << 48)
 #define DBG_UNSAFE_MATH		(1llu << 49)
+#define DBG_NO_DCC_FB		(1llu << 50)
 
 #define R600_MAP_BUFFER_ALIGNMENT 64
 #define R600_MAX_VIEWPORTS        16
diff --git a/src/gallium/drivers/radeon/r600_texture.c b/src/gallium/drivers/radeon/r600_texture.c
index d7ff2f7..796cbef 100644
--- a/src/gallium/drivers/radeon/r600_texture.c
+++ b/src/gallium/drivers/radeon/r600_texture.c
@@ -2198,7 +2198,8 @@ void evergreen_do_fast_color_clear(struct r600_common_context *rctx,
 		/* Fast clear is the most appropriate place to enable DCC for
 		 * displayable surfaces.
 		 */
-		if (rctx->chip_class >= VI) {
+		if (rctx->chip_class >= VI &&
+		    !(rctx->screen->debug_flags & DBG_NO_DCC_FB)) {
 			vi_separate_dcc_try_enable(rctx, tex);
 
 			/* Stoney can't do a CMASK-based clear, so all clears are
-- 
2.7.4